sponge off of
sponge (something) off (of) (someone or something)
To beg for, borrow, or obtain something (usually money or food) as a handout from someone or something else. My brother's been sponging money off my parents ever since he dropped out of college. My roommate's nice, but she's always sponging food off of me, and I don't have the heart to tell her to stop.
sponge something off of someone or somethingand sponge something off
to beg or borrow money or food from someone or a group. Please stop sponging food and money off your relatives! Stop sponging off food and money all the time!